Global workspace theory

Global workspace theory (GWT) is a framework for thinking about <a href="/facts/Consciousness/IAxmgt6c">consciousness</a> proposed by cognitive scientists <a href="/facts/Bernard_Baars/Y5g6kPJj">Bernard Baars</a> and <a href="/facts/Stan_Franklin/IjzFXnRx">Stan Franklin</a> in the late 1980s. It was developed to qualitatively explain a large set of matched pairs of conscious and unconscious processes. GWT has been influential in modeling consciousness and higher-order cognition as emerging from competition and integrated flows of information across widespread, parallel neural processes.
GWT analogizes the mind to a theater, with conscious thought being like material illuminated on the main stage. The brain contains many specialized processes or modules that operate in parallel, much of which is unconscious. Attention acts as a spotlight, bringing some of this unconscious activity into conscious awareness on the global workspace. The global workspace is a functional hub of broadcast and integration that allows information to be disseminated across modules. As such it can be classified as a <a href="/facts/Functionalism_(philosophy_of_mind)/o5doIVHb">functionalist</a> theory of consciousness.
When sensory input, memories, or internal representations receive attention, they enter the global workspace and become accessible to various cognitive processes. As elements compete for attention, those that succeed gain entry to the global workspace, allowing their information to be distributed and coordinated throughout the whole cognitive system.
GWT resembles the concept of working memory and is proposed to correspond to a 'momentarily active, subjectively experienced' event in working memory. It facilitates top-down control of attention, working memory, planning, and problem-solving through this information sharing.
In the 'theater of consciousness', a 'spotlight of selective attention' shines a bright spot on stage, revealing the contents of consciousness. Behind the scenes, in the dark, are the director (executive processes), stagehands, scriptwriters, scene designers, and the like. They shape the visible activities in the bright spot but are themselves invisible.
While aspects of GWT are matters of debate, it remains a focus of current research, including brain interpretations and computational simulations. It serves as a central information exchange, rather than a locus of cognition itself, enabling different specialized brain networks to interact and supporting integrated and adaptive responses.
Bernard Baars derived inspiration for the theory as the cognitive analog of the <a href="/facts/Blackboard_system/zdXSmaqA">blackboard system</a> of early artificial intelligence system architectures, where independent programs shared information.
Global Workspace Theory is one of the leading theories of consciousness.

Global workspace theory open-in-new

Global workspace theory